on the install U page, it says you need "flat stock" and locktite thread locker, what exactly are these 2 items, and what are they used for in the rotor swap?

 

If you read the install document in should be apparent.

Flat stock to span the 2 pistons in order to drive them back into the caliper with a C-clamp.

Thread locker is a type of glue that keeps a bolt from vibrating loose and backing out.

 

right,thnx